Fountain pen



Patented Aug. 27, 1929.

4,11151115.1521)STATES PATENT ioFFIcE.

FRANK M. ASHLEY,l F BROOKLYN, NEW YORK.

FOUNTAIN PEN.

.Application ined December 1, 192s. semi No. 322,996.

minimum degree. A further object is to.

provide a pen that has `a large ink capacity andwhich may be filled by insertingv the front end of the feed plug only, into the ink container.

The specific invention and the advantages of this construction will be pointed out hereinafter.

Referring to the drawings which form a part of this specification:

Fig. 1: is a longitudinal sectional view of a fountain pen embodying my invention. Fig. 2: is across sectional view, taken on line 2 2 of Fig. 1.

A indicates a cylindrical barrel having a smooth cylindrical bore o1' wall A- formed therein, and enlarged at A2 to provide a by-pass for ink. A pen section B- is connected to the barrel by a thread C and a feed plug D is fitted into the pen section in the usual manner. The feed plug D- is provided with the usual feed duct D2- and w1th a central bore D- which extends entirely `therethru. E- indicates a small tubeof glass or hard rubber, which is held firmly in the bore D- and extends about half .way to the middle of the barrel A. F indicates a piston which is fitted to slide freely in contact with the surface of the bore A- and which is of less length than the length of the by-pass chamber-A2- in which it normally rests. The piston is 40 provided with a tubular piston rod portion F- preferably formed integral therewith, the bore F2 of which fits over the surface of the tube E- in close sliding engagement. The piston rod portion F- is provided with a hole G- located near its end, as illustrated, and the end of said tube is fitted over and fastened to the inner end of a hard rubber tube I. The tube I is reinforced by a sti steel rod' J- which completely 4 50 fills said tube throughout its length. A soft rubber plug KA is fitted in tight abutment against the end of the tube I and rod J- and serves to close the end of the tube E-L and also to prevent ink from coming in contact with the metal rod J. The tube I and tube F- serve as a piston rod, which extends through the end plug .and is provided with a handle N. The plug 1s provided with acking material M- and gland .nut M. T e handle N- is. provided w1th a threaded projection N on its inner slde, which screws into the threaded end of the plug4 L, and when screwedtherein as shown, causes the end of the inner tube E to abut the plug K-, or if it does not abut, causes the end of the inner4 tube E to extend beyond the hole G and closes `the same, at which time the piston F will rest in the by-pass chamber A2 as shown, and open communication between the reservoir O- and the feed duct D2, the assage through the bore D- and hole being closed to prevent air from entering the reservoir Vthrough said bore. The end F- of the tube F- serves as an abutment to limit the outward movement of the piston rod durinv the filling operation. It is obvious that the tubular portion F could be made long enough to extend through the end plug L and thus dispense with the smaller tube I--, but this would require a larger stuffing box and increase the friction of the contacting surfaces, and also make it more difficult to keep a tight joint; also itwould reduce the ink capacity of the reservoir O-.

This construction provides a short stroke pen which permits the use of a rod of small diameter, whereas a long rod is apt to bend in the filling operation, and cause the packing to leak. The operation of filling is as follows:

Insert the end of the feed plug D- below the surface of the ink in the container, and reciprocate the piston two or three times: on the outward strokesl of the piston rod, the air in the reservoir is forced out through the hole G tube E- and bore D- and on the inward strokes the ink is drawn in thru said elements to fill the reservoir. A

Having thus described my invention, I claim as new:

1. A fountain en com rising a barrel having a smooth cylindrica reservoir closed at one end, a pin section held at its opposite end, a feed plug in said section having an ink duct and a bore extending longitudinally thereof, a tube extendino' from said bore into said reservoir, a piston iiaving a tubular rod extending over said tube and having an o ening located a predetermined distance rom i said piston and serving as a passage between i said reservoir and said first tube, and means for closing said passage; the construction bein such that-two or more successive outwar strokes of the piston rod will ex el air from the reservoir and the inward stro es will draw ink therein.

one end by a piston rod, a pen section held 'at its opposite end, a feed lug in said section having an ink duct and a ore extending 1ongitudinally thereof, a tube extending from said bore into said reservoir, a piston haV- ing a tubular rod extending over said tube and having an openin located a predetermined distanoe from said piston and serving as a passage between said reservoir and said first tube, said tubular rod having an'extension rod of smaller diameter connected thereto which extends thru said closed end of the barrel.

4. A fountain pen having the construction defined in claim 3, together with means for reinforcing said. extension rod, and means for shielding said reinforcing means from contact with ink.

In testimony whereof I have affixed my signature.

FRANK M. ASHLEY. 

